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  "briefingId": "UI-BRF-2026-09-09",
  "title": "UK Property Evidence Briefing",
  "releaseDate": "2026-09-09",
  "publishedAt": "2026-09-09T10:36:56.530Z",
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    "comparison": "/data/comparisons/2026-09-06--2026-09-09.json",
    "areaLayer": "/data/area-observations/2026-09-09.json",
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  "limitations": [
    "This edition includes verified approximate advert locations and postcode centres. Counts are not directly comparable with earlier editions.",
    "The 18 August 2026 area layer predates the immutable national manifest series. It remains available as historical evidence but is not counted as an approved national release.",
    "Current record representations are not counts of unique homes, bookings, tenancies or complete local market inventory.",
    "Local movement can reflect collection, geolocation and identity evidence as well as changes in the current market cross-section.",
    "Long-let rent, growth, sale-price and yield measures use their separately stated official evidence periods and are not inferred from the observation layer."
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}